[seqfan] Re: Prime Sums In A Grid

Edwin Clark eclark at math.usf.edu
Tue Feb 24 07:56:33 CET 2009


On Mon, 23 Feb 2009, David Wilson wrote:

> So, can you fill an infinite grid with distinct integers so that any two
> adjacent integers sum to a prime?
>

How about adding that no positive integers are omitted?  Here's an
example for the 4x4 case using integers 1 to 16:

11  12   5  14
  6   1   2  15
  7   4   3   8
16  13  10   9





More information about the SeqFan mailing list